Dust-guard.



UNITED STATES PATENT OFFICE- HERMAN BENSCH, OF DAVENPORT, IOWA.

DUST-GUARD.

Specification of Letters Patent.

Patented April 9, 1907.

A li ation filed April 25, 1906. Serial No. 313.597.

In the drawings, Figure 1 is a side elevation,

of my dust-guard applied to a journal, the latter being shown in section and the guard being partly broken away in section. Fig. 2 is a detail perspective view of the carrierplate. Fig. 3 is a crosssection on about line 3 3 of Fig. 1. Fig. 4 is a detail perspective view of one of the packing-blocks, and Fig. 5

is a side View of the spring-lock.

By my invention I seek to provide a dustguard which can be readily inserted in any of the ordinary journal-bloxes now in general use and which will comprise a series of radially-movable packing-blocks with the spring embracing the series and adapted to exert an inward tension on the several blocks, the blocks being movably held in suitable guides on a carrier-plate, as will be more fully described.

In the construction shown the carrier consists of a plate A, having a central opening A for the passage of the journal and provided with guides for the packing-blocks B, said guides C being arranged in a circular series surrounding the opening A. These guides are in the form of projections on the face of the plate A, and consist of the outwardlyprojecting plates C, notched in their outer edges at (J for the spring-rod D, and the flange-plates C projecting from the outer edges of the plate C in a plane parallel with the plate A and forming grooves in which the ends B- of the packing-blocks B are movable in and out, said ends B of the blocks B being preferably tenoned, as best shown in Figs. 1 and 4. It will be noticed that the guides each have a plate C projecting laterally from the carrier-plate and extending parallel to a line radial to the axis of the ournal-opening, and the flange-plate C projects from the outer edge of said first plate in a plane approximately parallel with that of the carrier-plate, and these plates C and C form keepers in which the packing-blocks move radially in the operation of the invention. The blocks B are, by preference, of wood with the grain running transversely, so that the said grain will be presented approximately in a radial direction with respect to the journal in order to secure the maximum wear in the use of the invention.

The blocks B fit and are movable radially in the guides of the carrier, and their ends abut at their inner edges to form a closure throughout the circle of the journal.

The rod D embraces the series of blocks B and the guides therefor and fits and operates within grooves B formed longitudinally in the outer edges of the blocks B, and also in the notches C in the outer edges of the guides, whereby the said rod is held from displacement and is permitted to exert a contracting tension in such manner as to force the series of blocks radially inward. The ends of the spring-rod D are slightly separated when applied, as shown in Fig. 1, and when it is desired to release the tension on the blocks B for any purpose, such as in applying the dustguard to the journal, any suitable form of wedge-block may be inserted between arms D, extended outwardly from the ends of the spring-rod, and flared at D as best shown in Fig. 1, in order to expand the spring-rod slightly to release the tension on the blocks. This construction of the spring-rod with the outwardly turned and flared ends facilitates the spreading of the spring to release the tension on the blocks, as will be readily understood from Fig. 1 of the drawings.

To prevent the shocks and jars experienced in use from forcing the plate downwardly, so that its edge will come in contact with the journal, I provide stops for engagement by the upper portion of the spring-rod to limit the downward movement of-the plate A relative to the packing-blocks B. These stops, as shown, consist of pins or studs A projecting from the face of the plate A, in position to engage the spring-rod near the separated ends thereof, as shown in Fig. 1, whereby to prevent the plate from coming in contact with the journal on any downward movement which may be given to the plate A in the use of the invention.

The construction is simple, easily oper-. ated, facilitates the exertion of a uniform tension on the several packing-blocks of the series, enables me to release such tension on all of the blocks at the same time, and may be supplied at a small cost and will he durable in use, the blocks B because oi the arrangement of the grain having great endurance, and such blocks when finally worn may be replaced at small cost.

I claiin 1. A dust-guar l substantially as herein described, eonfr ng z carrier-plate provided 1 a joi'rnal and with a eirciilar *ies ot g den si'rrotinding said opening and having plates i'n'ojecting outwardly from the EitLIlGI-Pltt'tt? and notehed in their outer edges and a so provided with l'langeplates projecting rom the outeredgesoteaid lirst plates in a plane approximate.yparallel with that of the carrier-p ate, stop-pins projecting front the carrier-piate adjz'nient to the u ip-er portion thereof, packing-b locks held at their ends in the g'iides ol' the :arrier and movable radially toward and from the opening for the journal, and a spring-rod eneircling the series of paelring-hloeks and engaging therewith to exert an inward tension With an ope-nin thereon, the upper portion of said spring-rod lying below the sti p-pins oi the carrier-pl ate and having between said pins the out yardly turned and llared ends, snbstimtia ly as and for the purpose set torth.

2. A dust-guard eoiniri ng a ':arrier-p ate having an opening for a 7' on rna; and provided with a circular series el guides sn'roi nding the same and eonsisting o lates projecting outwardlyfrom theear ier ate and i'iotehed in their outer edges to a spring-rod, and flange-plates ,HQlG {il ltlg it projectii'ig plates and toi aing guides tor the ends ol the packing ocks, peeking-lflocks liOltl in :aid guid \s and n'zoyable therein to rsaid outwardly- Ward and l roin the jonrnsit-opening, and the t swing-rod embracing the series ol paolqing- 1 blocks and lying in the notches in the plat es of the guides, substantially as set forth.

3. The combination in a dnst-guard with a carrier and a circular series of peeking-bloelrs ,held thereto and movable radially, ol a spring-rod encircling the series o'l packingbloclrs and exerting an inward tension! hereon and having the outwardly turned and llared eXtren'iities, the ends of the spring-rod in use not overla 'iping but being spared apart whereby a Wedge may be driven between the l'lared extremities to expand the spring-rod, substantially as set forth.

4;. J (list-guard roniprising a earrierplate having on one side a series ol' guide pro ections provided at their ends wi h keeper projections or flanges tor the all blocks and notehed in their outer eilg ts tor the spring-rod, the packing-liloelis haying at their ends tenons fitting in the guides cl the keepers and grooved longitndinally in their outer edges to reeeive the spring-rod, and the spring-rod litting in the notches ol the guide and in the longitudinal grooves ol the pacttrig-blocks, substantial as set l'orth,

5. itdnstegi'ard having a earrier-plate oyided with an opening lot a journa and as: having a circular series ot g ides around said opening and 0: ch having a plate projretincj late 'ally from the carrier-plat and extending par: llel to a line adial to the axis i journal-opening and flange-plates projecting fron the outer edge ol laid lirst p ates in a plane approxin atelyparzllelnith that ol th carrier-plate whereby to to" Whirh ackiitg oQks may more radially,

l torth.

substantially as i.

lll llt lllih't'lt l i.

"n: homers in ll i tnesses:

SoLoN C. Knnon, PERRY B, Tourist 

